Cart tub



FIG. 1 is a perspective view of a cart tub showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is bottom view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof.

The broken lines shown in the figures define the bounds of the claimed design and form no part of the claimed design. 

CLAIM We claim the ornamental design for a cart tub, as shown and described. 